We have a new documentation site for cPanel & WHM! You can find our new documentation site at docs.cpanel.net.

We will continue to maintain our API documentation on this server.

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This document is for a previous release of cPanel & WHM. To view our latest documentation, visit our Home page.

For cPanel & WHM 11.44


Before you install cPanel & WHM or cPanel DNSONLY, make certain that your server's software meets the following minimum requirements for new installations.

Supported operating systems

Operating systemAdditional restrictions

CentOS versions 5.x and 6.x

New installations of cPanel & WHM on CentOS servers must use CentOS version 6.0 or higher.
Red Hat Enterprise Linux® versions 5.x and 6.xNone.

CloudLinux 5.x and 6.x

cPanel does not support the use of Xen PV (paravirtualization) with CloudLinux.


We support all of the official production release kernels for these operating systems.


Supported virtual environments

Virtual environmentAdditional restrictions

Microsoft Server® 2008 Hyper-V

cPanel only supports the drivers and configurations that Microsoft provides.


  • cPanel only supports stable releases.
  • CloudLinux™ is not compatible with OpenVZ.
Oracle VM VirtualBox, VirtualBox OSENone.


CloudLinux is not compatible with Virtuozzo.
VMware® Server, VMware ESX ServerNone.
Xen, XenEnterprise™, XenExpress™, XenServer™None.


Virtual environments that are detected and reported as functional


Virtual environmentAdditional restrictions


In order for cPanel & WHM to detect SmartOS, you must use cPanel & WHM version 11.36.1 or higher.